package com.itguigu.glimail.ware.service.impl;


import com.alibaba.fastjson.TypeReference;
import com.itguigu.common.to.OrderTo;
import com.itguigu.common.to.mq.StockDetailTo;
import com.itguigu.common.to.mq.StockLockedTo;
import com.itguigu.common.utils.R;
//import com.itguigu.glimail.ware.feign.ProductFeignService;
import com.itguigu.glimail.ware.dao.WareOrderTaskDetailDao;
import com.itguigu.glimail.ware.entity.WareOrderTaskDetailEntity;
import com.itguigu.glimail.ware.entity.WareOrderTaskEntity;
import com.itguigu.glimail.ware.exception.NoStockException;
import com.itguigu.glimail.ware.feign.OrderFeignService;
import com.itguigu.glimail.ware.feign.ProductFeignService;
import com.itguigu.glimail.ware.service.WareOrderTaskDetailService;
import com.itguigu.glimail.ware.service.WareOrderTaskService;
import com.itguigu.glimail.ware.vo.*;
import com.rabbitmq.client.Channel;
import lombok.Data;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itguigu.common.utils.PageUtils;
import com.itguigu.common.utils.Query;

import com.itguigu.glimail.ware.dao.WareSkuDao;
import com.itguigu.glimail.ware.entity.WareSkuEntity;
import com.itguigu.glimail.ware.service.WareSkuService;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;


@Service("wareSkuService")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {
    @Autowired
    private WareSkuDao wareSkuDao;
@Autowired
    private WareOrderTaskDetailDao detailDao;

    @Autowired
    private ProductFeignService productFeignService;
    @Autowired
    WareOrderTaskDetailService orderTaskDetailService;
    @Autowired
    WareOrderTaskService orderTaskService;

    /**
     * 库存自动解锁
     * 1、 库存自动解锁。
     * 下订单成功，库存锁定成功，接下来的业务调用失败，导致订单回滚。之前锁定的库存就要自动解锁。
     * 2.订单失败
     * 锁库存失败
     *
     * 只要解锁库存失败  一定要告诉服务解锁失败  启动手动ack机制
     *
     * @param to
     * @param message
     */
    @Autowired
    OrderFeignService orderFeignService;
//    @RabbitHandler
//    public void handleStockLockedRelease(StockLockedTo to, Message message, Channel channel) throws IOException {
//        System.out.println("收到解库存消息");
//        StockDetailTo detail = to.getStockDetail();
//        Long detailId = detail.getId();
//        //解锁
//            //1、查询数据库关于这个订单的锁定库存信息。
//            //有: 证明库存锁定成功了
//                 //解锁: 订单情况。
//                //        1.没有这个订单。必须解锁
//                //        2、有这个订单。不是解锁库存。
//                     //        订单状态:已取消: 解锁库存
//                            //        没取消:不能解锁
//                 // 没有:库存锁定失败了，库存回滚了。这种情况无需解锁
//
//        long deliveryTag = message.getMessageProperties().getDeliveryTag();
//        WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
//        if (byId != null) {
//            //解锁
//            Long id = to.getId();
//            WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
//            String orderSn = taskEntity. getOrderSn();//根据订单号查询订单的状态
//            R orderStatus = orderFeignService.getOrderStatus(orderSn);
//
//            if (orderStatus.getCode() == 0) {
//                //订单数据返回成功
//                OrderVo data = orderStatus.getData(new TypeReference<OrderVo>() {
//                });
//                Integer status = data.getStatus();
//                if (data == null || status == 4) {
//                    //订单不存在
//                    //订单取消  才能解锁库存
//                    unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
//                    channel.basicAck(deliveryTag, false);
//                }
//
//            } else {
//                //消息拒绝  重新会队列
//                channel.basicReject(deliveryTag, true);
//            }
//
//        } else {
//            //无需解锁
//            channel.basicAck(deliveryTag, false);
//        }
//
//
//    }

    private void unLockStock(Long skuId,Long wareId,Integer num,Long detailTaskId) {

        wareSkuDao.unLock(skuId,wareId,num);
        //更新工作单的状态
        WareOrderTaskDetailEntity detailEntity = new WareOrderTaskDetailEntity();
        detailEntity.setId(detailTaskId);
        detailEntity.setLockStatus(2);//变为解锁

        detailDao.updateById(detailEntity);






    }

    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        /**
         * skuId: 1
         * wareId: 2
         */
        QueryWrapper<WareSkuEntity> queryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");
        if (!StringUtils.isEmpty(skuId)) {
            queryWrapper.eq("sku_id", skuId);
        }

        String wareId = (String) params.get("wareId");
        if (!StringUtils.isEmpty(wareId)) {
            queryWrapper.eq("ware_id", wareId);
        }


        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        //1、判断如果还没有这个库存记录新增
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if (entities == null || entities.size() == 0) {
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);
            //TODO 远程查询sku的名字，如果失败，整个事务无需回滚
            //1、自己catch异常
            //TODO 还可以用什么办法让异常出现以后不回滚？高级
            try {
                R info = productFeignService.info(skuId);
                Map<String, Object> data = (Map<String, Object>) info.get("skuInfo");

                if (info.getCode() == 0) {
                    skuEntity.setSkuName((String) data.get("skuName"));
                }
            } catch (Exception e) {

            }


            wareSkuDao.insert(skuEntity);
        } else {
            wareSkuDao.addStock(skuId, wareId, skuNum);
        }
    }

    @Override
    public List<SkuHasStockVo> getSkusHasStock(List<Long> skuIds) {

        List<SkuHasStockVo> collect = skuIds.stream().map(skuId -> {
            SkuHasStockVo vo = new SkuHasStockVo();
            //查询当前sku的总库存量
            Long count = baseMapper.getHasStock(skuId);
            vo.setSkuId(skuId);
            //count==null?false:count>0
            vo.setHasStock(count != null && count > 0);
            return vo;

        }).collect(Collectors.toList());
        return collect;
    }

    /**
     * 为某个订单锁定库存
     * 按照下单地址找到就近的仓库
     * 找到每隔商品在哪个仓库有库存
     * <p>
     * 库存解锁的场景
     * 1)、下订单成功，订单过期没有支付被系统自动取消、被用户手动取消。都要解锁库存
     * 2)、下订单成功，库存锁定成功，接下来的业务调用失败，导致订单回滚。之前锁定的库存就要自动解锁.
     *
     * @param vo
     * @return
     */
//    @Transactional(rollbackFor = NoStockException.class)
    //默认 只要是运行时异常都会滚
    @Autowired
    RabbitTemplate rabbitTemplate;
//     @Autowired
//    WareOrderTaskD rabbitTemplate;

    @Transactional
    @Override
    public Boolean orderLockStock(WareSkuLockVo vo) {
        /**
         * /**
         * *保存库存工作单的详情。
         * *追溯。
         * */
        WareOrderTaskEntity orderTaskEntity = new WareOrderTaskEntity();
        orderTaskEntity.setOrderSn(vo.getOrderSn());
        orderTaskService.save(orderTaskEntity);


        List<OrderItemVo> locks = vo.getLocks();
        List<SkuWareHasStock> collect = locks.stream().map(item -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            Long skuId = item.getSkuId();
//            item.setSkuId(skuId);
            stock.setSkuId(skuId);

            //查询这个商品在哪有库存
            List<Long> wareIds = wareSkuDao.listWareIdHasSkuStock(skuId);
            stock.setWareId(wareIds);
            stock.setNum(item.getCount());
            return stock;
        }).collect(Collectors.toList());
        //锁定库存
        Boolean allLock = false;
        for (SkuWareHasStock hasStock : collect) {
            Boolean skuStocked = false;
            Long skuId = hasStock.getSkuId();
            List<Long> wareIds = hasStock.getWareId();
            if (wareIds == null || wareIds.size() == 0) {
                //没有任何仓库有这个商品
                throw new NoStockException(skuId);
            }
            Integer num = hasStock.getNum();
            /**
             * //1.如果每一个商品都锁定成功，将当前商品锁定了几件的工作单记录发给MQ
             * //2、锁定失败。前面保存的工作单信息就回滚了。发送出去的消息，即使要解锁记录，由于去数据库查不到id,所以就不用了解锁(不合理)
             */
            for (Long wareId : wareIds) {
                Long count = wareSkuDao.lockSkuStock(skuId, wareId, num);
                if (count == 1) {
                    //todo 告诉mq库存锁定成功
                    skuStocked = true;
                    WareOrderTaskDetailEntity orderTaskDetailEntity = new WareOrderTaskDetailEntity(null, skuId, "", hasStock.getNum(), orderTaskEntity.getId(), wareId, 1);
                    orderTaskDetailService.save(orderTaskDetailEntity);
                    StockLockedTo lockedTo = new StockLockedTo();
                    lockedTo.setId(orderTaskEntity.getId());
                    //只发id不行  防止回滚以后 找不到数据
                    StockDetailTo stockDetailTo = new StockDetailTo();
                    BeanUtils.copyProperties(orderTaskDetailEntity,stockDetailTo);
                    lockedTo.setStockDetail(stockDetailTo);
                    rabbitTemplate.convertAndSend("stock-event-exchange","stock.locked",lockedTo);
                    break;

                } else {
                    //锁失败 重试下一个仓库

                }
            }
            if (!skuStocked) {
                //当前仓库都没锁住
                throw new NoStockException(skuId);
            }

        }
        //走到这  全部成功

        return true;
    }
@Transactional
    @Override
    public void unLockStock(StockLockedTo to) {
        StockDetailTo detail = to.getStockDetail();
        Long detailId = detail.getId();
        //解锁
        //1、查询数据库关于这个订单的锁定库存信息。
        //有: 证明库存锁定成功了
        //解锁: 订单情况。
        //        1.没有这个订单。必须解锁
        //        2、有这个订单。不是解锁库存。
        //        订单状态:已取消: 解锁库存
        //        没取消:不能解锁
        // 没有:库存锁定失败了，库存回滚了。这种情况无需解锁


        WareOrderTaskDetailEntity byId = orderTaskDetailService.getById(detailId);
        if (byId != null) {
            //解锁
            Long id = to.getId();
            WareOrderTaskEntity taskEntity = orderTaskService.getById(id);
            String orderSn = taskEntity. getOrderSn();//根据订单号查询订单的状态
            R orderStatus = orderFeignService.getOrderStatus(orderSn);

            if (orderStatus.getCode() == 0) {
                //订单数据返回成功
                OrderVo data = orderStatus.getData(new TypeReference<OrderVo>() {
                });

                if (data == null || data.getStatus() == 4) {
                    //订单不存在
                    //订单取消  才能解锁库存
                    //detailId
                    if (byId.getLockStatus()==1) {
                        //当前工作状态是1  已锁定但是未解锁  才可以解锁
                        unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                    }

                }

            } else {
                //消息拒绝  重新会队列
                throw new RuntimeException("远程服务失败");

            }

        } else {
//无需解锁
        }
    }
//防止订单服务卡顿  导致订单状态消息一直改不了,库存消息优先到期.查订单状态新建状态,什么都不做就走了
    //导致卡顿的订单一直不能解锁
    @Transactional
    @Override
    public void unLockStock(OrderTo to) {
        String orderSn = to.getOrderSn();
        //查一下最新状态 防止重复解锁
       WareOrderTaskEntity task= orderTaskService.getOrderTaskByOrderSn(orderSn);
        Long id = task.getId();
        ///按照工作单找到所有没有解锁的库存，进行解锁
        List<WareOrderTaskDetailEntity> entities = orderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>().
                eq("task_id", id)
                .eq("lock_status", 1));
        for (WareOrderTaskDetailEntity entity : entities) {

            unLockStock(entity.getSkuId(),entity.getWareId(),entity.getSkuNum(),entity.getId());
        }



    }

    @Data
    class SkuWareHasStock {
        private Long skuId;
        private List<Long> wareId;
        private Integer num;
    }
}
